如何從json格式提取值

Question

我需要從復雜的“ dict”中提取電子郵件（我是sql新手）

我以前看過關於同一主題的幾篇文章（例如， 這篇文章 ），但是似乎沒有一篇對我的數據有用

select au.details
from table_au au

結果：

{
   "id":3526,
   "contacts":[
      {
         "contactType":"EMAIL",
         "value":"name@email.be",
         "private":false
      },
      {
         "contactType":"PHONE",
         "phoneType":"PHONE",
         "value":"025/6251111",
         "private":false
      }
   ]
}

我需要：

name@email.be

Answer 1

select d.value -> 0 -> 'value' as Email 
from json_each('{"id":3526,"contacts":[{"contactType":"EMAIL","value":"name@email.be","private":false},{"contactType":"PHONE","phoneType":"PHONE","value":"025/6251111","private":false}]}') d 
where d.key::text = 'contacts'

輸出：

|   | email         |
 -------------------
|1  |"name@email.be"|

您可以在此處運行它： https : //rextester.com/VHWRQ89385